Lathe



March 31, 1925.

H. w. MELLING LATHE Filed'Febl 4, 1924 2 Sheets-Sheet 1 zlwumop Herman I'Y. Nell/n7 March 31. 1925. I

H. W. MELLING LATHE Filed 'Feb. 4, 1924 2 Sheets-Sheet 2 l iermal) Mime/ 11127 attozmagd Patented Mar. 31,1925.

HERMAN W. MIELLING, OF JACKSON, MICHIGAN.

LATHE.

Application filed February 4,3192%. Serial No. 690,501.

To all whom it may concern:

Be it known that I, I'IERMAN WV. MELLING, a citizen of the United States, residing at the city and county of Jackson, State of Michigan, have invented certain new and useful Improvements in Lathes, of which the following is a specification.

This invention relates to improvements in lathes.

The main object of this invention is to provide an improved lathe for the forming of polygonal objects such as hexagon nuts, square nuts, squared shafts and numerous other objects.

A further object. is to provide an improved structure of the class described which may be readily embodied in certain types of lathes now quite generally inuse.

A still further object is to provide a structure of the class described with an effective lubricating means.

Objects pertaining to details and economies of construction and operation of my improvements will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in th claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this application, in which:-

Fig. I is a fragmentary front elevation of a lathe embodying the features of my invention, parts being shown conventionally for convenience in illustration. v

Fig. II is an end view of one of the cutters and its driving means removed from the cutter carriage.

Fig. III is an enlarged detail view mainly in longitudinal section on a line correspond ing to line 33 of Figs. II and IV.

Fig. IV is a transverse section on a line corresponding to line 4-4 of Fig. III.

Figs. V, VI and VII are diagrammatic views illustrating the relation of the tool to the work and the movement of the tool whereby a rotary cutter is adapted to cut a flat surface.

Fig. VIII is a longitudinal section of the spindle supporting member.

Fig. IX is a perspective view of the finished work of the particular embodiment ofmy invention illustrated herein.

In the drawing the sectional views are taken looking in the direction of the little arrows at the ends of the section lines and similar reference numerals indicate similar parts throughout the several views.

Referring to the drawing, 1 represents PATENT 4mm.

the bed of the machine and 2 the legs thereof. The work turret 8 is provided with a plurality of work, holders 1-. The turret is driven with a step by step movement from,

the segment 5 on the shaft 6, the segment coacting with a gear 7 on the turret.

The main driving shaft 8 is dr1ven'froin a pulley 9 or other suitable source of power} and is provided with a gear 10 meshing with pinions 11 on the tool spindle driving shafts 12. The tool carriage 13 is mounted v in suitable ways and isinoved forward by the drum 18 on the shaft 6.- I

These parts described, in general, form no part of my invention and are referred to to suitably illustrate a practical embodiment of my improvements. I have embodied my improvements in the accompanying draw ing in a machine for manufacturing nuts,

the tool carria e bein rovided with "a )lu-' ralit 1 of tools for erformin the se arate a: operations thereon. v j v H The particular features of my improvements as herein embodied relate to the tool 19 which is designed to reduce the stock 20 to a hexagon form or to form the polygonal portion of the nut 21. The cutter or tool illustrated has three teeth or blades 22, the nut being a hexagonal nut.

The tool 19 is supported in a spindle 23' carried by thetool' carriage13. tool carriage is a gearbox 24 havinga 131 0? jectingbearing 25 for the spindle supporting member 26. This spindle supporting member 26 has a bore-like bearing 27 for the tool spindle, thisbearing being disposed On this with its axis at anangleto the axis of the supporting member hearing.

In the embodiment illustratedthe bearing 27 is centered at the inner end of thespindle supporting member 26. The bear1ng25 is provided with a bushing 28 for the supports ing member, 26 while th'e'supporting jn1e1nber 26 is provided with a bushing 29, for the spindle. I r

The spindle is provided with a gear 30 at "posed within the gear box 24.

into the passage 36.

its inner end while the spindle supporting member has a gear 31. The spindle driving shaft 12 has a gear 32, the gears being dis- A gear 83 meshes with the gear 32 while the gears 34 and 35 mesh with the gears, 30 and 31, re-

spectively, the gears 83, 84L and 35 being With the parts thus arranged therotation of the member 26 imparts a lateral. swinging movement to the tool spindle moving it to and from the axis of the workas the tool and also the work revolve. The gears 30 and 31 and EA and 35 are of such sizes that the spindle supporting member is rotated once while each tooth is acting upon the work, thus gradually moving the tool to and from the axis of the work to compensate for the difference in the radial distance in the length of the radii of the completed work passing through the angles or intersecting the flat surfaces, the result being that a flat face is formed by each cut.

In the embodiment illustrated the work, tool spindle and the spindle supporting member are revolved in the ratio of one, two and six.

To lubricate the bearing parts I provide the end of the bearings as indicated by the arrows. Y

The lubricant is supplied by the conduit- 40 disposed between the gears 30 and 32 and having a laterally turned end 41 projecting Lathes embodying my improvements are of large capacity and may be made automatic; I have not illustrated and described various adaptations to different kinds of work as I believe the disclosure made will enable those skilled in the art to which my invention relates toembodyor adapt the same as may be desired. I I

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: l

1'. The combination with a gear box, of a driving shaft, a tool spindle, a rotatable spindle supporting member provided with a bearing for said tool spindle inclined to the axis of the said supporting member,

end of said spindle supporting member, a bearing for said supporting member, said supporting member and spindle bearings being provided with bushings, said spindle having a lubricant passage extending from 2. The combination with a gear box, of a driving shaft, a tool spindle, a rotatable spindle supporting member provided with a bearing for said tool spindle 1ncl1ned to .the axis of the said supporting member,

such bearing being centered at the inner end of said spindle supporting member, gears on said driving shaft, tool spindle and spindle supporting member disposed within said gear box, and a train of-gears connecting said gear on'said' driving shaft spindle supporting member.

3. The combination with a gear box, of a' tool spindle, a rotatable spindle supporting member provided with a bearing for said toolspindle inclined to the axis of the said supporting member, a bearing for said supporting member, said supporting member and spindle bearings being provided with with said gears on said tool spindle and bushings, said spindle having a lubricant I passage extending from its inner end and opening laterally centrally thereof, sainbushing and spindle supporting member having lubricant openings therethrough, an oil supply conduit delivering to the inner end of said lubricant passage, and driving means for said tool spindle and spindle sup porting member.

l. The combination of a tool spindle, a tool carried by said spindle and provided with a plurality of teeth, a rotatable spindle supporting member provided with aspindle bearing non-concentric with the bearing of said spindle whereby a lateral movement is imparted to the spindle by the rotation of said supporting member, said spindle being provided with a longitudinal oil passage having lateral discharge openings, means for supplying lubricant to said spindle-passage,

whereby its bearing and said supporting member bearing are lubricated, and means for driving said spindle and its said support 5. The combination of a tool spindle, a

7 tool carried by said spindle and provided such bearing being centered at'the inner imparted to the spindle by the rotation of said supporting member, and means for driving said spindle and its said support timed so that they are rotated at a ratio corresponding to the number of teeth of the tool.

6. The combination with a gear box, of a tool spindle, a rotatable spindle supporting member provided with a bearing for said tool spindle disposed so that theaxis of said spindle is inclined to the axis of its said supporting member,'a bearing for said supporting member, said spindle having a lubricant passage extending from its inner end and opening laterally centrally thereof, said spindle supporting member having a lubricant opening therethrough to its bearing, an oil supply conduit delivering to the inner end of said lubricant passage, and driving means for said tool spindle and its said'supporting member.

7. The combination with a gear box, of a tool spindle, a rotatable spindle supporting member provided with a bearing for said tool spindle, a bearing for said supporting member, said spindle having a lubricant passage extending from its inner end and opening'laterally centrally thereof, said spindle supporting member having a lubricant opening tl'ierethrough to its bearing, an oil supply conduit delivering to the inner end of said lubricant passage, and driving means for said tool spindle and its said supporting member.

8. The combination with a gear box, of a tool spindle, a rotatable spindle supporting member provided with a bearing for said tool spindle inclined to the axis of the said supporting member, such bearing being centered at the center of the spindle driving gear, and driving means for said tool spindle and spindle supporting member.

9. The combination with a gear box, of a tool spindle, a rotatable spindle supporting member provided with a bearing for said tool spindle disposed so that the axis of said spindle is inclined to the axis of its said supporting member, and driving means for said tool spindle and its said supporting member. 1

10. The combination of a tool spindle, a rotatable spindle supporting member provided with a bearing forsaid spindle disposed so that the spindle is supported with its axis at an angle to the axis of its said supporting member, a cutter provided with a plurality of teeth, and means for driving said spindle and its said support timed so that the cutter is moved to and from the work while each tooth thereof isperforming its out.

11. The combination of a tool spindle, a rotatable supporting member therefor provided with a bearing, the axis of which is inclined to the axis of said supporting member, such bearing being centered at the inner end of said supportingmember, gears on the inner ends of said spindle and supporting member, and a train of driving gears comprising gears meshing with said spindle and supporting member gears.

12. The combination with a tool spindle, of a rotatable supporting member therefor provided with a longitudinalbearing inclined to the axis of said supporting member, such bearing being centered at the inner end of said supporting member, and means for driving said spindle and its said supporting member at different relative speeds, all coacting for the purpose specified. 7

i 13. The combination with a tool spindle, of a rotatable supporting member provided with a bearing for said tool spindle disposed relative to said supporting member so that a lateral movement is imparted to the tool by the rotation of said supporting member, and means for synchronously rotating said tool spindle and its said supporting memben In witness whereof, I have hereunto set my hand. i

HERMAN W. MELLING. 1 

